Substantiation of technology for obtaining capsules of a multi-component drug with neurotropic action

Abstract

The aim of the work. Theoretical and experimental substantiation of a rational technology for obtaining a preparation in the form of capsules based on uridine-5-monophosphate of disodium salt, cytidine-5-monophosphate of disodium salt, vitamin B₆, thioctic acid and magnesium lactate dihydrate, determination of process parameters that can affect critical quality characteristics active pharmaceutical ingredients in the product and establishing acceptance criteria for each critical process parameter to be used in batch production and process control.

Materials and methods. Objects of the research: masses for encapsulation, granulates and the finished product - capsules with the conventional name “Neuronucleos”. To obtain capsules, active pharmaceutical ingredients (API) were used: uridine-5-monophosphate disodium salt and cytidine-5-monophosphate disodium salt (Shanghai Oripharm Co. Ltd., China), thioctic acid (Shanghai Modern Pharmaceutical Co., Ltd..”, China), pyridoxine hydrochloride (“DSM Nutritional Products GmbH”, Germany), magnesium lactate (“Moes Cantabra S.L.”, Spain). The quality indicators were studied: description, average mass of content and uniformity of mass, uniformity of dosage units, dissolution, accompanying impurities, quantitative content of API. Methods of liquid chromatography and complexometric titration were used.

Results. It has been established that the use of the direct mixing method does not allow obtaining a mass for encapsulation corresponding to the indicator "Bulk density". The use of the wet granulation method in a fluidized bed has been substantiated. It has been shown that it is difficult to perform granulation in a fluidized bed of an API mixture containing thioctic acid. It has been established that it is rational to obtain a mass for encapsulation in two stages: obtaining a granulate from magnesium lactate dihydrate and pyridoxine hydrochloride with a moisturizer solution (sorbitol + uridine-5-monophosphate disodium salt + cytidine-5-monophosphate disodium salt) and then obtaining a mass for encapsulation from granulate, thioctic acid, anhydrous colloidal silicon dioxide and magnesium stearate by the direct mixing method.

Conclusions. On the basis of the performed technological research and analysis of the quality of the obtained capsules, a method for obtaining a capsule mass using the method of wet granulation in a fluidized bed was chosen. The granulation mode was substantiated and the optimal parameters for obtaining a high-quality product were selected, the acceptance criteria for each critical parameter of the technological process were established